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Lookup NU author(s): Dr Wen Xiao
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
© 2017 International Society for Photogrammetry and Remote Sensing, Inc. (ISPRS) Inaccurate exterior orientation parameters (EoPs) between sensors obtained by pre-calibration leads to failure of registration between panoramic image sequence and mobile laser scanning data. To address this challenge, this paper proposes an automatic registration method based on semantic features extracted from panoramic images and point clouds. Firstly, accurate rotation parameters between the panoramic camera and the laser scanner are estimated using GPS and IMU aided structure from motion (SfM). The initial EoPs of panoramic images are obtained at the same time. Secondly, vehicles in panoramic images are extracted by the Faster-RCNN as candidate primitives to be matched with potential corresponding primitives in point clouds according to the initial EoPs. Finally, translation between the panoramic camera and the laser scanner is refined by maximizing the overlapping area of corresponding primitive pairs based on the Particle Swarm Optimization (PSO), resulting in a finer registration between panoramic image sequences and point clouds. Two challenging urban scenes were experimented to assess the proposed method, and the final registration errors of these two scenes were both less than three pixels, which demonstrates a high level of automation, robustness and accuracy.
Author(s): Li J, Yang B, Chen C, Huang R, Dong Z, Xiao W
Publication type: Article
Publication status: Published
Journal: ISPRS Journal of Photogrammetry and Remote Sensing
Print publication date: 01/02/2018
Online publication date: 19/12/2017
Acceptance date: 09/12/2017
Date deposited: 27/02/2018
ISSN (print): 0924-2716
ISSN (electronic): 1872-8235
Publisher: Elsevier BV
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